What is Concatenation?
Concatenation is the technique with which two or more variables are joined together. While using strings, one should be careful to use the escape character (\) whenever a ' or " (whichever is used to store the value of the string variable) is encountered. This tells the browser that the ' or " is to be printed on the webpage. If the escape character is not used, the browser will think that ' or " is a command to end the string.
In the above self explanatory code, various variables have been created. Three variables are strings, one of them with the escape character (\) included so that the " in the string is printed in the webpage. Two more variables are numbers. The + operator illustrates how it acts as per the type of the variable. If the variables are strings, the + operator concatenates them. If the variables are numbers, the + operator adds the numbers. The + operator can be used to concatenate two or more strings.